<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>表单</title>
    <style>
        table tr td{
          border: red 1px solid;
        }
    </style>
</head>
<body>
<form>
<table>
    <tr>
     <td>用户名</td>
        <td> <input type="text" name="username"value="username"> </td>
        <tr>
        <td>密码</td>
        <td > <input type="password"name="password"value="password"> </td>
     </tr>
    </tr>
</table>
</form>
</body>
</html>